The University of Tennessee just released the findings from a study which ties marital bliss to body fat on Thursday afternoon and the campus said it is already getting hit with calls from National Media outlets all wanting to know the story behind it.

Researchers found couples were more satisfied when their wives were thinner than their husbands.

The researchers followed 169 newlywed couples for four year. Right after the couples' weddings, UT made note of their individual heights and weights.

From there, they interviewed and re-measured the couples once every six months. Findings showed that husbands were more satisfied if their wives had lower body mass indexes than their own and their wives seemed to feel the same way.

Those with lower BMI's than their husbands seemed to be happiest too. "We used BMI - but that's an important point - it's not absolute thinnest - it's relative thinness, so it was to any extent that a wife had a smaller BMI than her husband," said Andrea Meltzer.

BMI or Body Mass Index is the key part of that statement. BMI is found by using your height and weight to estimate how much body fat you have.

The average American woman is just under 5 ft 4 inches tall. That means, according to the CDC, if she weighs somewhere between 108 to 145 pounds, she'll have a healthy BMI index.

The average American man is just over 6 feet 1 inch tall. The same scale shows she should weight between 140 and 189 pounds to have a healthy BMI index.

That is what researchers said the study really proves. It is not abour dress size or pant size.

"So I think the important thing there is that it's not just thin women - which some people might believe it going to lead to mariatal satisfaction - but really, it's that difference so just being smaller than the husband," said Meltzer.

Why study body mass and martial happiness? UT said it is just one part of an on-going study into relationships. They also paid for the research through a national grant.

Friday morning on Fox 43, Abby and Moira will talk one-on-one with the researchers behind it starting at 7:00 a.m.